Cement-block mold



FILED JULY 26, 1920.

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,y l Ilullhlmiimllul"Hump "ih l bulli Hmm hl wvl/5N T012 I gn/@WMM v 9m/WMZ@ Patented dan. 2, 1923..

JOHN A. NELSON,OF ROCKLISLANDIIISNOIS.'

- CEMENT-BLOCK MOLD.

Roelf island, in the countyof Rock Island and State of illinois, have invented certain new and useful vlmprovements .in .Clemente lloclr Molds, of which the following is a specification. v

.Tl/ty invention has reference to cement block molds, and has for its chief purpose to enhance the facilities for producing building blocks of the kind mentioned, and increase the efficiency of such blocks, when tlu'is produced. lt relates specially to the construction of blocks possessing one or more irregular or ornamental faces, such as are known as a rock-cut finish, and other u `ll-ltnovfn patterns.

'in vthe formation of blocks of this kind it has been found lto be impossible to use a mixture of material containing a desired amount of water, for the reason that the ma terial will adhere to the mold when the block 'is bling removed therefrom, resulting in the injury of the block, by breaking or otherlt has therefore been found necessary to use a comparatively dry mixture near the ace of the block, as a result of which the product, after being permitted to cure, has

not possessed the desired amount of efficiency and durability.

iy the use of my invention it is possible to provide a material for those parts of the block which are adjacent to the ornamental faces thereof with a greater amount of moisture than is contained in or required by other parts of the block, with much better results in the way of giving added strength and efciency to the figured faces of the block. llt'also forms a more compact stone, and maires the same more water proof. I attain this result by providing an auxiliaryform consisting of a thin shell, or plate, which ma;Y be permitted to adhere tothe block when it is removed from the mold, and remain attached thereto until the block has become sutliciently hard to warrant its removul.

fn the drawings my invention is shown in use with a mold of conventional pattern, hut it is not limited to use therewith, as it is capable of being employed with any style of mold, wherein the Darts of the mold are seg'iarated from the block to permit the removal thereof. v

lnthe drawings: c. i

ig. isla crossfsection-ofa-mold fitted with .my ...invention .Fig-lise PQIS'pective :view of one of the4 l ujeplresents `.ajbase, vwhich may. be fsup-V y ported in rany, suitable manner, @asin z-a cement block machine, to one side of which base is secured a plate 2, forming one side of the mold. At the opposite side of the base is hingedly secured a plate 3, forming the other side of the mold. Such plate is adapted to be tipped outwardly into a horizontal position upon a support 4. Connected with the plate 3, so as to have a rocking movement therewith, is a plate 5 (such connection not being shown in the drawings), the upper ,face of which plate is provided with an irregular form, or pattern, `for the production of a block face of the desired finish, and the ends of the molds are closed by plates 6, one of which is shown in the drawings provided with an irregular pattern. It is sometimes necessary to provide a block with the desired finish. on one end, as for corner bloc-ks of a building, and sometimes at both ends, as where the block is to be used in a column or pier. i.

Supported on the plate 5 is a thin sheet'7, formed of metal, which conforms on both of its faces with the pattern in the plate, so that when the mold is filled with material, that part thereof which is adjacent to the sheet 7 will have reproduced thereon the pattern of the plate. Vhen the material has been thoroughly tamped the block is tipped outwardly upon the plate 3, interposed between which plate and the block is a pallet 8, upon which the block rests, and

by means of which it can be removed'from the machine. In a mold of the kind shown the end pieces are usually hinged to the part 3 so as to drop away therefrom, and the plate. 5 is also associated with such plate so as to rock away therefrom and permit the removal `of the block. The sheet 7,. however, instead of rocking away with the plate 5, adheres to the block, protecting'the `face thereof, and insuring its perfect condition until the block is sufficiently hard to warrant the removal thereof. As above mentioned, this feature makes it possible for that part of the block adjacent to the irregular form to receive a greater amo-unt of moisture than is given to other parts of the. block.

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When the end-plates G are provided with an irregular formation, they can also be fur' nished With an auxiliary sheet, similar to the part 7, which Will also cling to Jche block,-

upon its removal from the mold.

It will be obvious fhaf in the construction of a number of the blocks at one 'time it would be necessary to provide a similar number of Jche sheets 7, as one of such sheets could not be used for a period of approximately twenty-four hours. Each mold would therefore require a set of such auxiliary patterns. These could be of any design, as for the rook-cut finish already mentioned, for plain panels, hush hammered, lattice, stucco finish, or any other vof the numerous designs with which artificial stone blocks are provided. y y

Vhat ,l claim and desire to secure, 1s:

l. ln combination vwith a mold, having anirregular formation in one of its faces, an auxiliary pattern comprising a thin metal sheet conforming to said formation on both of its faces.

rllfhe comlination with a mold having Corresponding ornamental formations on tiro or more ofits inner faces, of auxiliary metal plaies adapted to be supported against said faees,'and conforming to said formations on both faces of said plates,

ln testimony whereof l affix my signature 'JOHN A. NELSON. 

